Keystones — Capstone
Five GCSE retrieval questions · 20 July 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 1⁄2 + 1⁄3 + 2⁄3
Answer: 3⁄2 -
2. Algebra
Expand: 5(8x - 11)
Answer: 40x - 55 -
3. Geometry
Adjacent = 30cm, hypotenuse = 49cm. Find the angle
Answer: 52.2° -
4. Ratio
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 25. If 5 of them are 49, 41, 15, 41, 46, what is the missing number?
Answer: -42